diff --git a/processor/src/main/java/org/mapstruct/ap/internal/model/Mapper.java b/processor/src/main/java/org/mapstruct/ap/internal/model/Mapper.java
index 7e58580de..7c270c1bf 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/model/Mapper.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/model/Mapper.java
@@ -193,8 +193,6 @@ public class Mapper extends GeneratedType {
 
     /**
      * Checks if the mapper has a custom implementation that is a custom suffix of an explicit destination package.
-     *
-     * @return
      */
     public boolean hasCustomImplementation() {
         return customImplName || customPackage;
diff --git a/processor/src/main/java/org/mapstruct/ap/internal/model/MappingMethod.java b/processor/src/main/java/org/mapstruct/ap/internal/model/MappingMethod.java
index ab5026fb7..a8fa9381d 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/model/MappingMethod.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/model/MappingMethod.java
@@ -55,11 +55,6 @@ public abstract class MappingMethod extends ModelElement {
     /**
      * constructor to be overloaded when local variable names are required prior to calling this constructor. (e.g. for
      * property mappings). It is supposed to be initialized with at least the parameter names.
-     *
-     * @param method method
-     * @param existingVariableNames existingVariableNames
-     * @param beforeMappingReferences
-     * @param afterMappingReferences
      */
     protected MappingMethod(Method method, Collection<String> existingVariableNames,
                             List<LifecycleCallbackMethodReference> beforeMappingReferences,
diff --git a/processor/src/main/java/org/mapstruct/ap/internal/model/PropertyMapping.java b/processor/src/main/java/org/mapstruct/ap/internal/model/PropertyMapping.java
index bf8a87318..9e22f69e0 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/model/PropertyMapping.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/model/PropertyMapping.java
@@ -31,7 +31,6 @@ import java.util.Set;
 
 import javax.lang.model.element.ExecutableElement;
 import javax.lang.model.type.DeclaredType;
-import javax.lang.model.type.TypeMirror;
 
 import org.mapstruct.ap.internal.model.assignment.AdderWrapper;
 import org.mapstruct.ap.internal.model.assignment.ArrayCopyWrapper;
@@ -169,9 +168,6 @@ public class PropertyMapping extends ModelElement {
         // initial properties
         private String dateFormat;
         private String defaultValue;
-        private List<TypeMirror> qualifiers;
-        private List<String> qualifyingNames;
-        private TypeMirror resultType;
         private SourceReference sourceReference;
         private SelectionParameters selectionParameters;
 
@@ -181,11 +177,6 @@ public class PropertyMapping extends ModelElement {
         }
 
         public PropertyMappingBuilder selectionParameters(SelectionParameters selectionParameters) {
-            if ( selectionParameters != null ) {
-                this.qualifiers = selectionParameters.getQualifiers();
-                this.qualifyingNames = selectionParameters.getQualifyingNames();
-                this.resultType = selectionParameters.getResultType();
-            }
             this.selectionParameters = selectionParameters;
             return this;
         }
diff --git a/processor/src/main/java/org/mapstruct/ap/internal/model/source/selector/CreateOrUpdateSelector.java b/processor/src/main/java/org/mapstruct/ap/internal/model/source/selector/CreateOrUpdateSelector.java
index 584615c92..1b7573f8e 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/model/source/selector/CreateOrUpdateSelector.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/model/source/selector/CreateOrUpdateSelector.java
@@ -46,7 +46,6 @@ public class CreateOrUpdateSelector implements MethodSelector {
                                                          Type sourceType, Type targetType,
                                                          SelectionCriteria criteria) {
 
-        boolean isCreateMethod = mappingMethod.getMappingTargetParameter() == null;
         List<T> createCandidates = new ArrayList<T>();
         List<T> updateCandidates = new ArrayList<T>();
         for ( T method : methods ) {
diff --git a/processor/src/main/java/org/mapstruct/ap/internal/util/TypeHierarchyErroneousException.java b/processor/src/main/java/org/mapstruct/ap/internal/util/TypeHierarchyErroneousException.java
index bd82a8702..16598618a 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/util/TypeHierarchyErroneousException.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/util/TypeHierarchyErroneousException.java
@@ -27,6 +27,7 @@ import javax.lang.model.element.TypeElement;
  *
  */
 public class TypeHierarchyErroneousException extends RuntimeException {
+    private static final long serialVersionUID = 1L;
 
     private TypeElement element;